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vmparam.h revision 1.24
      1  1.24   simonb /*	$NetBSD: vmparam.h,v 1.24 2000/12/12 23:46:22 simonb Exp $	*/
      2   1.7      cgd 
      3   1.1      cgd /*
      4   1.1      cgd  * Copyright (c) 1988 University of Utah.
      5   1.6  mycroft  * Copyright (c) 1982, 1986, 1990, 1993
      6   1.6  mycroft  *	The Regents of the University of California.  All rights reserved.
      7   1.1      cgd  *
      8   1.1      cgd  * This code is derived from software contributed to Berkeley by
      9   1.1      cgd  * the Systems Programming Group of the University of Utah Computer
     10   1.1      cgd  * Science Department.
     11   1.1      cgd  *
     12   1.1      cgd  * Redistribution and use in source and binary forms, with or without
     13   1.1      cgd  * modification, are permitted provided that the following conditions
     14   1.1      cgd  * are met:
     15   1.1      cgd  * 1. Redistributions of source code must retain the above copyright
     16   1.1      cgd  *    notice, this list of conditions and the following disclaimer.
     17   1.1      cgd  * 2. Redistributions in binary form must reproduce the above copyright
     18   1.1      cgd  *    notice, this list of conditions and the following disclaimer in the
     19   1.1      cgd  *    documentation and/or other materials provided with the distribution.
     20   1.1      cgd  * 3. All advertising materials mentioning features or use of this software
     21   1.1      cgd  *    must display the following acknowledgement:
     22   1.1      cgd  *	This product includes software developed by the University of
     23   1.1      cgd  *	California, Berkeley and its contributors.
     24   1.1      cgd  * 4. Neither the name of the University nor the names of its contributors
     25   1.1      cgd  *    may be used to endorse or promote products derived from this software
     26   1.1      cgd  *    without specific prior written permission.
     27   1.1      cgd  *
     28   1.1      cgd  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     29   1.1      cgd  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     30   1.1      cgd  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     31   1.1      cgd  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     32   1.1      cgd  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     33   1.1      cgd  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     34   1.1      cgd  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     35   1.1      cgd  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     36   1.1      cgd  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     37   1.1      cgd  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     38   1.1      cgd  * SUCH DAMAGE.
     39   1.1      cgd  *
     40   1.6  mycroft  * from: Utah $Hdr: vmparam.h 1.16 91/01/18$
     41   1.6  mycroft  *
     42   1.7      cgd  *	@(#)vmparam.h	8.2 (Berkeley) 4/19/94
     43   1.1      cgd  */
     44   1.1      cgd 
     45  1.13  thorpej #ifndef _HP300_VMPARAM_H_
     46  1.13  thorpej #define	_HP300_VMPARAM_H_
     47  1.13  thorpej 
     48   1.1      cgd /*
     49   1.1      cgd  * Machine dependent constants for HP300
     50   1.1      cgd  */
     51  1.22  thorpej 
     52  1.22  thorpej /*
     53  1.22  thorpej  * We use 4K pages on the hp300.  Override the PAGE_* definitions
     54  1.22  thorpej  * to be compile-time constants.
     55  1.22  thorpej  */
     56  1.22  thorpej #define	PAGE_SHIFT	12
     57  1.22  thorpej #define	PAGE_SIZE	(1 << PAGE_SHIFT)
     58  1.22  thorpej #define	PAGE_MASK	(PAGE_SIZE - 1)
     59  1.13  thorpej 
     60   1.1      cgd /*
     61   1.1      cgd  * USRTEXT is the start of the user text/data space, while USRSTACK
     62   1.1      cgd  * is the top (end) of the user stack.  LOWPAGES and HIGHPAGES are
     63   1.1      cgd  * the number of pages from the beginning of the P0 region to the
     64   1.1      cgd  * beginning of the text and from the beginning of the P1 region to the
     65   1.1      cgd  * beginning of the stack respectively.
     66   1.1      cgd  *
     67   1.1      cgd  * NOTE: the ONLY reason that HIGHPAGES is 0x100 instead of UPAGES (3)
     68   1.1      cgd  * is for HPUX compatibility.  Why??  Because HPUX's debuggers
     69   1.1      cgd  * have the user's stack hard-wired at FFF00000 for post-mortems,
     70   1.1      cgd  * and we must be compatible...
     71   1.1      cgd  */
     72  1.10  thorpej #define	USRTEXT		8192			/* Must equal __LDPGSZ */
     73   1.1      cgd #define	USRSTACK	(-HIGHPAGES*NBPG)	/* Start of user stack */
     74   1.1      cgd #define	BTOPUSRSTACK	(0x100000-HIGHPAGES)	/* btop(USRSTACK) */
     75   1.1      cgd #define P1PAGES		0x100000
     76   1.1      cgd #define	LOWPAGES	0
     77   1.1      cgd #define HIGHPAGES	(0x100000/NBPG)
     78   1.1      cgd 
     79   1.1      cgd /*
     80   1.1      cgd  * Virtual memory related constants, all in bytes
     81   1.1      cgd  */
     82   1.1      cgd #ifndef MAXTSIZ
     83   1.6  mycroft #define	MAXTSIZ		(8*1024*1024)		/* max text size */
     84   1.1      cgd #endif
     85   1.1      cgd #ifndef DFLDSIZ
     86  1.24   simonb #define	DFLDSIZ		(32*1024*1024)		/* initial data size limit */
     87   1.1      cgd #endif
     88   1.1      cgd #ifndef MAXDSIZ
     89   1.6  mycroft #define	MAXDSIZ		(64*1024*1024)		/* max data size */
     90   1.1      cgd #endif
     91   1.1      cgd #ifndef	DFLSSIZ
     92   1.1      cgd #define	DFLSSIZ		(512*1024)		/* initial stack size limit */
     93   1.1      cgd #endif
     94   1.1      cgd #ifndef	MAXSSIZ
     95   1.1      cgd #define	MAXSSIZ		MAXDSIZ			/* max stack size */
     96   1.1      cgd #endif
     97   1.1      cgd 
     98   1.1      cgd /*
     99   1.1      cgd  * Sizes of the system and user portions of the system page table.
    100   1.1      cgd  */
    101   1.1      cgd /* SYSPTSIZE IS SILLY; IT SHOULD BE COMPUTED AT BOOT TIME */
    102   1.1      cgd #define	SYSPTSIZE	(2 * NPTEPG)	/* 8mb */
    103   1.1      cgd #define	USRPTSIZE 	(1 * NPTEPG)	/* 4mb */
    104   1.1      cgd 
    105   1.1      cgd /*
    106   1.1      cgd  * PTEs for mapping user space into the kernel for phyio operations.
    107   1.1      cgd  * One page is enough to handle 4Mb of simultaneous raw IO operations.
    108   1.1      cgd  */
    109   1.1      cgd #ifndef USRIOSIZE
    110   1.1      cgd #define USRIOSIZE	(1 * NPTEPG)	/* 4mb */
    111   1.1      cgd #endif
    112   1.1      cgd 
    113   1.1      cgd /*
    114   1.1      cgd  * PTEs for system V style shared memory.
    115   1.1      cgd  * This is basically slop for kmempt which we actually allocate (malloc) from.
    116   1.1      cgd  */
    117   1.1      cgd #ifndef SHMMAXPGS
    118   1.1      cgd #define SHMMAXPGS	1024		/* 4mb */
    119   1.1      cgd #endif
    120   1.1      cgd 
    121   1.1      cgd /*
    122   1.1      cgd  * External IO space map size.
    123   1.1      cgd  * By default we make it large enough to map up to 3 DIO-II devices and
    124   1.1      cgd  * the complete DIO space.  For a 320-only configuration (which has no
    125   1.1      cgd  * DIO-II) you could define a considerably smaller region.
    126   1.1      cgd  */
    127   1.1      cgd #ifndef EIOMAPSIZE
    128   1.1      cgd #define EIOMAPSIZE	3584		/* 14mb */
    129   1.1      cgd #endif
    130   1.1      cgd 
    131   1.1      cgd /*
    132   1.1      cgd  * The time for a process to be blocked before being very swappable.
    133   1.1      cgd  * This is a number of seconds which the system takes as being a non-trivial
    134   1.1      cgd  * amount of real time.  You probably shouldn't change this;
    135   1.1      cgd  * it is used in subtle ways (fractions and multiples of it are, that is, like
    136   1.1      cgd  * half of a ``long time'', almost a long time, etc.)
    137   1.1      cgd  * It is related to human patience and other factors which don't really
    138   1.1      cgd  * change over time.
    139   1.1      cgd  */
    140   1.1      cgd #define	MAXSLP 		20
    141   1.1      cgd 
    142   1.1      cgd /*
    143   1.1      cgd  * Mach derived constants
    144   1.1      cgd  */
    145   1.1      cgd 
    146   1.1      cgd /* user/kernel map constants */
    147  1.16   kleink #define VM_MIN_ADDRESS		((vaddr_t)0)
    148  1.16   kleink #define VM_MAXUSER_ADDRESS	((vaddr_t)0xFFF00000)
    149  1.16   kleink #define VM_MAX_ADDRESS		((vaddr_t)0xFFF00000)
    150  1.16   kleink #define VM_MIN_KERNEL_ADDRESS	((vaddr_t)0)
    151  1.16   kleink #define VM_MAX_KERNEL_ADDRESS	((vaddr_t)0xFFFFF000)
    152   1.1      cgd 
    153   1.1      cgd /* virtual sizes (bytes) for various kernel submaps */
    154  1.19    ragge #define VM_PHYS_SIZE		(USRIOSIZE*NBPG)
    155   1.1      cgd 
    156   1.1      cgd /* # of kernel PT pages (initial only, can grow dynamically) */
    157  1.16   kleink #define VM_KERNEL_PT_PAGES	((vsize_t)2)		/* XXX: SYSPTSIZE */
    158  1.13  thorpej 
    159  1.13  thorpej /*
    160  1.13  thorpej  * Constants which control the way the VM system deals with memory segments.
    161  1.13  thorpej  * The hp300 only has one physical memory segment.
    162  1.13  thorpej  */
    163  1.13  thorpej #define	VM_PHYSSEG_MAX		1
    164  1.13  thorpej #define	VM_PHYSSEG_STRAT	VM_PSTRAT_BSEARCH
    165  1.13  thorpej #define	VM_PHYSSEG_NOADD
    166  1.15  thorpej 
    167  1.15  thorpej #define	VM_NFREELIST		1
    168  1.15  thorpej #define	VM_FREELIST_DEFAULT	0
    169  1.13  thorpej 
    170  1.13  thorpej /*
    171  1.13  thorpej  * pmap-specific data stored in the vm_physmem[] array.
    172  1.13  thorpej  */
    173  1.13  thorpej struct pmap_physseg {
    174  1.13  thorpej 	struct pv_entry *pvent;		/* pv table for this seg */
    175  1.13  thorpej 	char *attrs;			/* page attributes for this seg */
    176  1.13  thorpej };
    177  1.13  thorpej 
    178  1.13  thorpej #endif /* _HP300_VMPARAM_H_ */
    179